<template>
	<div>
		<!-- 面包屑导航 B -->
		<el-breadcrumb separator-class="el-icon-arrow-right">
			<el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
			<el-breadcrumb-item>商品管理</el-breadcrumb-item>
			<el-breadcrumb-item>添加商品</el-breadcrumb-item>
		</el-breadcrumb>
		<!-- 面包屑导航 E -->

		<!-- 卡片视图区 B -->
		<el-card>
			<!-- 提示区 B -->
			<el-alert
			    title="添加商品信息"
			    type="info"
			    show-icon
				center
				:closable="false">
			  </el-alert>
			<!-- 提示区 E -->

			<!-- 步骤条 B -->
			<!-- active 中的减 0 操作是将字符串转换成数值型 -->
			<el-steps :space="200" :active="activeIndex - 0" finish-status="success" :align-center="true">
			  <el-step title="基本信息"></el-step>
			  <el-step title="商品参数"></el-step>
			  <el-step title="商品属性"></el-step>
			  <el-step title="商品图片"></el-step>
			  <el-step title="商品内容"></el-step>
			  <el-step title="完成"></el-step>
			</el-steps>
			<!-- 步骤条 E -->

			<!-- tab 栏区域 B -->
			<el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">
			  <el-tabs v-model="activeIndex" tab-position="left" :before-leave="beforeTableave" @tab-click="tabClicked">
			      <el-tab-pane label="基本信息" name="0">
					  <el-form-item label="商品名称" prop="goods_name">
						  <el-input v-model="addForm.goods_name"></el-input>
					  </el-form-item>
					  <el-form-item label="商品价格" prop="goods_price">
					  	  <el-input v-model="addForm.goods_price" type="number"></el-input>
					  </el-form-item>
					  <el-form-item label="商品重量" prop="goods_weight">
					  	  <el-input v-model="addForm.goods_weight" type="number"></el-input>
					  </el-form-item>
					  <el-form-item label="商品数量" prop="goods_number">
					  	  <el-input v-model="addForm.goods_number" type="number"></el-input>
					  </el-form-item>
					  <el-form-item label="商品分类" prop="goods_cat">
						  <!-- option 代表数据源
							   props 代表配置项
						  -->
					  	  <el-cascader
					  	      :options="catelist"
					  	      :props="cateProps"
					  	      v-model="addForm.goods_cat"
							  expand-trigger="hover"
					  	      @change="handleChange"></el-cascader>
					  </el-form-item>
				  </el-tab-pane>
			      <el-tab-pane label="商品参数" name="1">
					<!-- 渲染表单的 item 项 B -->
					<el-form-item :label="item.attr_name" v-for="(item,index) in manyTableData" :key="item.attr_id">
						<!-- 复选框组 B -->
						<el-checkbox-group v-model="item.attr_vals">
						   <el-checkbox label="cb" v-for="(cb,i) in item.attr_vals" :key="i" border></el-checkbox>
						  <!--  <el-checkbox label="复选框 B"></el-checkbox>
						    <el-checkbox label="复选框 C"></el-checkbox>
						    <el-checkbox label="禁用" disabled></el-checkbox>
						    <el-checkbox label="选中且禁用" disabled></el-checkbox> -->
						</el-checkbox-group>
						<!-- 复选框组 E -->
					</el-form-item>
					<!-- 渲染表单的 item 项 E -->
				  </el-tab-pane>
			      <el-tab-pane label="商品属性" name="2">
					  <el-form-item label="item.attr_name" v-for="(item,index) in onlyTableData" :key="item.attr_id">
						  <el-input v-model="item.attr_vals"></el-input>
					  </el-form-item>
				  </el-tab-pane>
			      <el-tab-pane label="商品图片" name="3">
					  <!--
							action 表示图片要上传到的后台 api 地址
							on-preview 预览事件
							on-remove 处理移除图片的操作
							file-list 用来指定文件列表的
							list-type 用来指定文件列表地显示类型

					   -->
					  <el-upload
						:on-success="handleSuccess"
						:headers="headerObj"
					    :action="uploadURL"
					    :on-preview="handlePreview"
					    :on-remove="handleRemove"
					    :file-list="fileList"
					    list-type="picture">
					    <el-button size="small" type="primary">点击上传</el-button>
					    <div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div>
					  </el-upload>
				  </el-tab-pane>
			  	  <el-tab-pane label="商品内容" nmae="4">
					  <quill-editor
					      ref="myQuillEditor"
					      v-model="addForm.goods_introduce"
					      :options="editorOption"
					      @blur="onEditorBlur($event)"
					      @focus="onEditorFocus($event)"
					      @ready="onEditorReady($event)"/>

					  <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
				  </el-tab-pane>
			  </el-tabs>
			</el-form>
			<!-- tab 栏区域 E -->

		</el-card>
		<!-- 卡片视图区 E -->

		<!-- 图片预览 B -->
		<el-dialog
		  title="图片预览"
		  :visible.sync="previewVisible"
		  width="50%"
		  :before-close="handleClose">
			<img :src="previewPath" class="previewImg">
		  </span>
		</el-dialog>
		<!-- 图片预览 E -->

	</div>
</template>

<script>
import _ from 'lodash'

export default {
  data() {
    return {
      // 进度条显示
      activeIndex: '0',
				 // 添加商品的表单数据对象
				 addForm: {
					 goods_name: '',
					 goods_price: 0,
					 goods_weight: 0,
					 goods_number: 0,
					 // 商品所属的分类数组
					 goods_cat: [],
					 // 图片的数组
					 pics: [],
					 // 商品的详情描述
					 goods_introduce: '',
					 attrs: []
				 },
				 // 表单的验证规则
				 addFormRules: {
					 goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' }
					 ],
					 goods_price: [
					 	{ required: true, message: '请输入商品价格', trigger: 'blur' }
					 ],
					 goods_weight: [
					 	{ required: true, message: '请输入商品重量', trigger: 'blur' }
					 ],
					 goods_number: [
					 	{ required: true, message: '请输入商品数量', trigger: 'blur' }
					 ],
					 goods_cat: [
					 	{ required: true, message: '请选择商品分类', trigger: 'blur' }
					 ]
				 },
				 // 商品分类列表
				 catelist: [],
				 //
				 cateProps: {
					 label: 'cat_name',
					 value: 'cat_id',
					 children: 'children'
				 },
				 // 动态参数列表
				 manyTableData: [],
				 // 静态属性列表
				 onlyTableData: [],
				 // 上传图片的地址
				 uploadURL: 'https://www.liulongbin.top:8888/api/private/v1/upload',
      // 图片上传组件的请求头
      headerObj: {
        Authorization: window.sessionStorage.getItem('token')
      },
      previewPath: '',
      //
      previewVisible: false

    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    // 获取所有商品分类数据
    async getCateList() {
      const { data: res } = await this.$http.get('categories')

      if (res.meta.status !== 200) {
        this.$message.error('获取数据失败!')
      }
      this.$message.success('获取数据成功!')

      console.log(res.data)

      this.catlist = res.data
    },
    // 级联选择器选中项变化, 会触发这个函数
    handleChange() {
      console.log(this.addForm.goods_cat)
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
      }
    },
    //
    beforeTableave(activeName, oldActiveName) {
      console.log('即将离开的标签页名字是:' + oldActiveName)
      console.log('即将进入的标签页名字是:' + activeName)
      // if(oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
      // 	this.$message.error('请先选择商品分类!')
      // 	return false;
      // }
    },
    //
    async tabClicked() {
      console.log(this.activeIndex)
      // 如果 activeIndex === 1 证明访问的是动态参数面板
      if (this.activeIndex === '1') {
        // console.log('动态参数面板')
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, {
          params: {
            sel: 'many'
          }
        })
        if (res.meta.status !== 200) {
          return this.$message.error('获取动态参数列表失败!')
        }
        // console.log(res.data)
        // 将后台的字符串数据转换成数组
        res.data.forEach(item => {
          item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        })
        this.manyTableData = res.data
      } else if (this.activeIndex === '2') {
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, {
          params: {
            sel: 'only'
          }
        })
        if (res.meta.data !== 200) {
          return this.$message.error('获取静态属性失败!')
        }
        this.$message.success('获取静态属性成功!')
        console.log(res.data)
        this.onlyTableData = res.data
      }
    },
    // 处理图片预览事件
    handlePreview(file) {
      this.previewVisible = true
      // console.log(file)
      this.previewPath = file.response.data.url
    },
    // 处理移除图片的操作
    handleRemove(file) {
      // console.log(file)
      // 1. 获取将要删除的图片的临时路径
      const filePath = file.response.data.tmp_path
      // 2. 从 pics 数组中, 找到这个图片对应的索引值
      const i = this.addForm.pics.findIndex(x => x.pic === filePath)
      // 3. 调用数组的 splice 方法, 把图片信息对象, 从 pics 数组中移除
      this.addForm.pics.splice(i, 1)
      // console.log(this.addForm)
    },

    // 监听图片上传成功的事件
    handleSuccess(response) {
      // console.log(response)
      // 1. 拼接得到一个图片信息对象
      const picInfo = { pic: response.data.tmp_path }
      // 2. 将图片信息对象, push 到 pics
      this.addForm.pics.push(picInfo)
      // console.log(this.addForm)
    },
    // 添加商品
    add() {
      console.log(this.addForm)
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) {
          return this.$message.error('请填写必要的表单项!')
        }
        // 执行添加的业务逻辑
        // 1. 将 goods_cat 转成字符串, 然后传到数据库
        // 2. 在执行此行代码时先将 addForm 数组进行深拷贝
        // 深拷贝 lodash cloneDeep(obj)
        const form = _.cloneDeep(this.addForm)
        form.goods_cat = form.goods_cat.join(',')
        // console.log(form)
        // 处理动态参数
        this.manyTableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(' ')
          }
          this.addForm.attrs.push(newInfo)
        })
        // 处理静态属性
        this.onlyTableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals
          }
          this.addForm.attrs.push(newInfo)
        })
        form.attrs = this.addForm.attrs
        console.log(form)
        // 发起请求添加商品
        // 商品的名称, 必须是唯一的
        // const {data: res} = await this.$http.post('goods', form)

        const { data: res } = await this.$http.post('goods', form)
        if (rs.meta.status !== 201) {
          return this.$message.error('添加商品失败!')
        }
        this.$message.success('添加商品成功!')
        this.$router.push('/goods')
      })
    }

  },
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    }
  }

}
</script>

<style lang="less" scoped>
	.el-checkbox {
		margin-right: 0 !important;
	}
	.previewImg {
		width: 100%;
	}
	.btnAdd {
		margin-top: 15px;
	}
</style>
